logic
# logic.py to be
# imported in the 2048.py file
# importing random package
# for methods to generate random
# numbers.
import random
# function to initialize game / grid
# at the start
def start_game():
# declaring an empty list then
# appending 4 list each with four
# elements as 0.
mat =[]
for i in range(4):
mat.append([0] * 4)
# printing controls for user
print("Commands are as follows : ")
print("'W' or 'w' : Move Up")
print("'S' or 's' : Move Down")
print("'A' or 'a' : Move Left")
print("'D' or 'd' : Move Right")
# calling the function to add
# a new 2 in grid after every step
add_new_2(mat)
return mat
# function to add a new 2 in
# grid at any random empty cell
def add_new_2(mat):
# choosing a random index for
# row and column.
r = random.randint(0, 3)
c = random.randint(0, 3)
# while loop will break as the
# random cell chosen will be empty
# (or contains zero)
while(mat[r] != 0):
r = random.randint(0, 3)
c = random.randint(0, 3)
# we will place a 2 at that empty
# random cell.
mat[r] = 2
# function to get the current
# state of game
def get_current_state(mat):
# if any cell contains
# 2048 we have won
for i in range(4):
for j in range(4):
if(mat[i][j]== 2048):
return 'WON'
# if we are still left with
# atleast one empty cell
# game is not yet over
for i in range(4):
for j in range(4):
if(mat[i][j]== 0):
return 'GAME NOT OVER'
# or if no cell is empty now
# but if after any move left, right,
# up or down, if any two cells
# gets merged and create an empty
# cell then also game is not yet over
for i in range(3):
for j in range(3):
if(mat[i][j]== mat[i + 1][j] or mat[i][j]== mat[i][j + 1]):
return 'GAME NOT OVER'
for j in range(3):
if(mat[3][j]== mat[3][j + 1]):
return 'GAME NOT OVER'
for i in range(3):
if(mat[i][3]== mat[i + 1][3]):
return 'GAME NOT OVER'
# else we have lost the game
return 'LOST'
# all the functions defined below
# are for left swap initially.
# function to compress the grid
# after every step before and
# after merging cells.
def compress(mat):
# bool variable to determine
# any change happened or not
changed = False
# empty grid
new_mat = []
# with all cells empty
for i in range(4):
new_mat.append([0] * 4)
# here we will shift entries
# of each cell to it's extreme
# left row by row
# loop to traverse rows
for i in range(4):
pos = 0
# loop to traverse each column
# in respective row
for j in range(4):
if(mat[i][j] != 0):
# if cell is non empty then
# we will shift it's number to
# previous empty cell in that row
# denoted by pos variable
new_mat[i][pos] = mat[i][j]
if(j != pos):
changed = True
pos += 1
# returning new compressed matrix
# and the flag variable.
return new_mat, changed
# function to merge the cells
# in matrix after compressing
def merge(mat):
changed = False
for i in range(4):
for j in range(3):
# if current cell has same value as
# next cell in the row and they
# are non empty then
if(mat[i][j] == mat[i][j + 1] and mat[i][j] != 0):
# double current cell value and
# empty the next cell
mat[i][j] = mat[i][j] * 2
mat[i][j + 1] = 0
# make bool variable True indicating
# the new grid after merging is
# different.
changed = True
return mat, changed
# function to reverse the matrix
# means reversing the content of
# each row (reversing the sequence)
def reverse(mat):
new_mat =[]
for i in range(4):
new_mat.append([])
for j in range(4):
new_mat[i].append(mat[i][3 - j])
return new_mat
# function to get the transpose
# of matrix means interchanging
# rows and column
def transpose(mat):
new_mat = []
for i in range(4):
new_mat.append([])
for j in range(4):
new_mat[i].append(mat[j][i])
return new_mat
# function to update the matrix
# if we move / swipe left
def move_left(grid):
# first compress the grid
new_grid, changed1 = compress(grid)
# then merge the cells.
new_grid, changed2 = merge(new_grid)
changed = changed1 or changed2
# again compress after merging.
new_grid, temp = compress(new_grid)
# return new matrix and bool changed
# telling whether the grid is same
# or different
return new_grid, changed
# function to update the matrix
# if we move / swipe right
def move_right(grid):
# to move right we just reverse
# the matrix
new_grid = reverse(grid)
# then move left
new_grid, changed = move_left(new_grid)
# then again reverse matrix will
# give us desired result
new_grid = reverse(new_grid)
return new_grid, changed
# function to update the matrix
# if we move / swipe up
def move_up(grid):
# to move up we just take
# transpose of matrix
new_grid = transpose(grid)
# then move left (calling all
# included functions) then
new_grid, changed = move_left(new_grid)
# again take transpose will give
# desired results
new_grid = transpose(new_grid)
return new_grid, changed
# function to update the matrix
# if we move / swipe down
def move_down(grid):
# to move down we take transpose
new_grid = transpose(grid)
# move right and then again
new_grid, changed = move_right(new_grid)
# take transpose will give desired
# results.
new_grid = transpose(new_grid)
return new_grid, changed
# this file only contains all the logic
# functions to be called in main function
# present in the other file
Created: 7/8/2025
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